package com.atguigu.springcloud.service;


import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentServiceImpl implements PaymentService{
    @Override
    public String paymentInfo_OK(long id) {
        return "线程池："  + Thread.currentThread().getName() + "\t paymentInfo_OK,id:" + id + "\t O(∩_∩)O哈哈~";
    }


    /**
     * HystrixCommand定义方法三秒不返回，则执行fallbackMethod指定的方法
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeoutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    @Override
    public String paymentInfo_Timeout(long id) {
        int timeout = 3000;
        try {
            TimeUnit.MICROSECONDS.sleep(timeout);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        return "线程池："  + Thread.currentThread().getName() + "\t paymentInfo_Timeout,id:" + id + "\t O(∩_∩)O哈哈~" + "耗时（秒）+ " + timeout;
    }


    public String paymentInfo_TimeoutHandler(long id){
        return "线程池："  + Thread.currentThread().getName() + "\t 系统超时或运行错误:" + "\t o(╥﹏╥)o" + "请稍后再试 ";
    }



    // ==========服务熔断

    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), // 是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"), // 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"), // 失败率达到多少后
    })
    public String paymentCircuitBreaker(@PathVariable("id") long id){
        if(id < 0){
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t 调用成功，流水号：" + serialNumber;
    }



    public String paymentCircuitBreaker_fallback(@PathVariable("id") long id){
        return "id 不能负数，请稍后再试，id: " + id;
    }
}
